Most collectors start out mounting single stamps, and sizing a mount for a single stamp is easy. Then a block of four turns up in a lot, or a plate block, or a large commemorative that is bigger than anything else in the album. Suddenly the usual approach feels less obvious. The good news is that the same careful habits apply. You just need to think a little more about measuring, spacing, and how the piece will sit on the page.
Why Larger Pieces Need Extra Care
A block is several stamps still joined together, and that is exactly how many collectors prefer to keep them. Because the stamps are connected, the piece is heavier and less flexible than a single stamp. It can flex or catch on an edge if the mount is too tight, and the perforations between stamps are more delicate than they look.
Oversized stamps have a similar problem. A large, thin piece of paper can curl or crease if it is forced into a small pocket. A mount that is made for the job lets the piece lie flat and stay flat.
Measure the Whole Piece, Not One Stamp
Measure the full width and full height of the block or large stamp, including the perforations or margins on every side. Write both numbers down. It helps to measure twice, because a small error at this size can mean a mount that is just a little too short.
Then choose a mount with a bit of room beyond those numbers. You want the piece to slide in easily, without pressing or bending anything. A small amount of space all around is far better than a tight fit.
Strips and Pre-Cut Mounts: Which Is Easier?
Pre-cut mounts come in set sizes, which makes them quick when your piece happens to match one. Strips are sold by the length and can be cut to fit almost any dimension, which makes them a natural choice for unusual blocks and oversized stamps. If you collect a mix of sizes, keeping both on hand covers most situations.
When you cut a strip, use a sharp blade or a good pair of scissors and make clean, straight cuts. Check the finished piece against your measurements before you load the stamp.
Plan the Page Before You Mount
Larger mounts take up more room, so it pays to lay everything out first. Place the empty mounts on the album page and look at how they sit next to one another. Leave a little space between them so the page does not feel crowded and so each piece is easy to pull out later.
If a block does not fit comfortably on the page you planned for it, consider giving it a page of its own. A block that is displayed well is far more enjoyable than one squeezed in beside other stamps.
Handle With Tongs, Every Time
Larger pieces tempt people to pick them up by hand because they are easy to grip. Resist that. Use stamp tongs to slide the block into the mount, supporting the piece gently so it does not flex. Doing it slowly takes only a few extra seconds and keeps the gum and the paper clean.
A Quick Checklist
- Measure the full width and height of the piece, including perforations.
- Choose a mount with a little room to spare on every side.
- Use strips for unusual or oversized pieces and pre-cut mounts for common sizes.
- Lay out the page with empty mounts before you load any stamps.
- Load each piece with tongs and support it gently.
Small Steps, Big Payoff
Blocks and larger stamps are often the pieces collectors care about most, so they deserve a mount that fits well and protects them for the long haul. A few minutes of careful measuring and planning now means those pieces stay flat, clean, and ready to enjoy for years to come.

